国道G318西藏境内玉普至然乌段溜沙坡32km集中了51处较大规模的溜砂坡地质灾害，其中49处存在明显的地表水作用，严重影响G318公路的安全营运。由于野外调查受恶劣天气和险恶环境等因素影响，长期持续观测较为困难，导致溜砂坡形成和搬运因素的认识不足，工程治理措施欠完备，治理效果不甚理想。本项目将采用野外长期观测调查、模型试验、数值模拟及理论分析方法，进一步深入研究溜沙坡在地表水作用下失稳与运动机理，丰富和完善溜砂坡的理论，以提出更为合理可靠的治理措施，为国道G318整治及川藏铁路、滇藏铁路的修建提供可靠的防治措施。

Yupu conuty to Ranwu county is 32km, where is a section of state road 318 in Tibet, there are 51 talus slopes of larger scale, among them 49 slopes are existing obvious mixed water and sand flow phenomenon. The geology disasters seriously affect the safe operation of the state road 318. Because of severe weather and environment, a longtime observation to talus slopes is difficult, leading to the study to the formation and movement of talus slopes is insufficient, so the treatment measures for them need completed. In this paper, the longtime observation, model test, numerical simulation and theoretical analysis methods are used to study the mechanism of talus slopes’ failure and movement under surface water. Some references for the theory of talus slope are provided and more proper and reliable treatment measures are put forward. The study results can provide guides for talus slope treatment in state road 318, Sichuan to Tibet railway and Yunnan to Tibet railway.